Chemistry - Salt Analysis Question with Solution | TestHub

ChemistrySalt AnalysisTEST OF ANIONS CLASS A-SUBGROUP IMedium2 minQB

ChemistryMediumsingle choice

Consider following two observation in test tubes contain clear solution.

Select statement which is must be true?

Options:

Answer:

Solution:

Test tube-1 shows no precipitate with Ca²⁺ because calcium thiosulfate is soluble, but forms a white precipitate with Pb²⁺ (PbS₂O₃). This white precipitate dissolves in an excess of thiosulfate ions due to the formation of a soluble complex, $[P b (S_{2} O_{3})_{2}]^{2 -}$ . This chemical behavior uniquely confirms that Test tube-1 contains thiosulfate (S₂O₃²⁻) ions. Therefore, statement (C) is the correct option.

Stream:JEESubject:ChemistryTopic:Salt AnalysisSubtopic:TEST OF ANIONS CLASS A-SUBGROUP I

⏱ 2mℹ️ Source: QB

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